Outside farm to table dinner in the wine country?

My boyfriend's birthday is in July and I'm trying to plan something unique. He's mentioned wanting to participate in a farm to table dinner that's outside, preferably in a vineyard. I've looked online and have had little luck finding such events in the Napa/Sonoma or Livermore area. Does anyone have any suggestions?

Della Fattoria Ranch Dinners: http://www.dellafattoria.com/ranch/ra...Dates for this summer have not yet been announced but you can email them and ask them to contact you when they set their events calendar.

Thank you everyone for the good ideas! I e-mailed Della Fattoria and I'm considering Quivira... Knoll Farms looks great too but $190 a head is a little more than I was looking to pay. Someday when I'm rich we'll check it out!